Wrench.



No. 889,246. PATENTBD JUNE 2, 1908.

m. B. LA'INB & s. N. HALL; wmmon.

APPLICATION FILED 1120.3 1907.

2 SHEETS-SHEET l.

Illlllll' INVIITOIS PATENTED JUNE 2, 1908.

H. B. LAYNE 6: S. N. HALL.

WRENCH.

urucn'mx w-zn 1120.3. 1901.

2 SHEETS-SHEET 2- l lllll "NIL llllllllllllll ITIIO'IS v gnarl? W fwjfiz UNITED ST S PATENT OFFICE.

MAHLON l5. LAYNE AN!) SAMUEL N. HALL, OF HOUSTON, TEXAS.

WRENCH.

Specification of Letters Patent.

Patented Juno 2, 1908.

Application filed December 3, 1907. Serial No. 404,938.

To all whom it may crmeern:

Be it known that we, MAnLoN E. Lime. and SAMl'l-Zl. HALL, citizens of the United States, residing at Houston, in the county of Harris and State of Texas, have invented certain new and useful I mprovements in vrt'm'hcs, of which the following is a specification.

The invention relates to wrenches and particularly to pipe wrenches ol' the chain type. The invention has for its primary object; the )rovision of a. double acting wrench in whic I both of the jaws are similar and interchangeable and are provided with additional sets of tdeth wherebv the life of the jaws is increased. One em )odime'nt of the invention is illustrated in thcaccompnnying dmwimi, wherein igure 1 is a side elevation of the operntive parts of the wrench, s. portion of the handle and of the ip chain being broken away,

Figure 2 18 a perspective view of the end of the handle,

Figure 3 is a side elevstion'ol' the inside face of one of the jaw plates,

Figure 4 is a longitudinal section through one of the grip jaw on the. line l\"----1V of Fi re 3, and

igure 5 is an end elevation of the wrench.

The wrench is of the neral typo shown in our co-pendingapp ications serial No. 404,935, but constitutes an improvement thereover, in that the jaw plates are each provided with a pair of additional sets of teeth, which ma be used after the other teeth are dull and worn, thereby materially lengthening the life of the wrench.

Referring to the drawing, 1 is the handle havingthe operating end 2 as shown in detail.

in Figure 2. As here illustrated the end is enlsrned andtprovidcd with the slot- 3 for the rece tion of e chain, 4 provided books 5, for detachably en agin I the chain. The chain is of the t in devices of this hnd, wherein the. pintlcs 1 construction ads ts'the chain to fit bet-ween the sides of the eeks-5; while-tho ends of the pintles project out laterally a sullicient. distance toengsge the front sides of such books. 8

are the j awplates, one of which is fitted to each sideof the end of the handle, and claim ued in position by means of the transverse olt 9 'assmgthrough such jaw plates and the cross locks4. Eachof the plates is provided at its and the cross blocksat their upper ends with the- OH inari y employed opposite side with the two sets of teeth 10, whereby the device is made double acting and whereby after one side of the jaw plates is worn out, they ms be turned over and the unworn sets of teet brought into osition f or use. The recess 11 is provide intermediate the sets of teeth 10, on each side of the jaw plates in order to permit of the trans- [er of -the pipe from one set of teeth to the other without releasing the chain, and in order to provide the slack in the chain for its release when the ipe is laced in such central recess 11. l'ach o the jaw plates 'm provided with the transverse gioove 12 for tting over the cross blocks 4, whereby the plates are held rigidly against turning when the clamp bolt 9 is tightened. It will be noted that the jaw plates are symmetrical on opposite sides of the center line AA (figure 3%, and also on opposite sides of the line IV I ,which construction provides for the interchanpeability of the jaws from one side of the hand c to the other, and also providesfor turning the jaws over, so that after the teeth on one side have been worn those on the other side may be brought into positionfor use.

both jaws are precisely alike, only one set of forging dies isnecessary, thus reducing the expense offorging the jaws toa minimum. The end of the 'pchainis rmanently secured in the slot 3 y means a pin or rivet passing through the chain, and the openings 13 in the end thehandle. The pin or rivet may be eithcrsecurely fixed in the handle by means of heads or nuts, or made of the same diameter throughout, and in this case prevcnted'from dis lacement bymeans of the jaw plates which overlap the openings 13. It will be seen that by arran i li the rmanent securing means upon t e and e as well as the hooks 5, the construction of the. jaw plates 8 is simplified and cheapened and projecti parts on the jaw plates are avoided whic arts would render diflicult the malting of siglzh jaw plates reversible and interchangea c.

Having thusdescribed our invention and illustrated its use, what we claim as new and desire to secure by Letters Patent is the fol- IOWlflft- 1. n a pipe wrench, a handle havipg at.

one end means for detachabl engaging a chain, a. pair of elonga interc ange ab e jaw lates clamped to opposite sides of the hand 6 at an angle thereto, and each provided on its opposite longitudinal sides with two lots of oppooitely' acting teeth nmnged po'tlui. one let openhvely engages the pipe inn tin bundle is tamed in one llll't'cllm qld the other set operatively' engngva the a p pe when the movgmout-of the handle is manned, thenwith a grip chain am-lum'il of the handle adjucem the jaw 2. In a; wrench, a. handle having at one end 10 may! for detwhgbly engaging a. grip ('lllllll. A a par qppoaing interchangeable jaw plates "on ogpoum' sides of the 0nd of tho llllllllll. f each ly -phte being groviilml on its uppnsiw longitudinal aides wit two acts of u ipnsiu'ly l5 mung mill lying at Opposite cm 5 ul' lllv l side, and msitlnnml an that umnl' said svls is bruugbl imun Xl'llllflll by nmvmm-m nl' \lulmmllo in "no ilm-vtiun mul tluother set is brnu 'ln imu uponuiun by muvvnwm nf tlw lmmllv in u n'vi-rsi- \lirm-iinn, iu'oilu-r with a grip vlmin mn-lmrml at "no lllirlfl llu' vml of tlw lmmllv carrying llujuw pluws. 

